Definition of DMD (dystonia musculorum deformans)

DMD (dystonia musculorum deformans): Also called torsion dystonia, this is a rare, generalized dystonia (a state of abnormal -- either excessive of inadequate -- muscle tone) that can be inherited, usually begins in childhood, and becomes progressively worse. It can leave individuals seriously disabled and confined to a wheelchair.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=8250
Last Editorial Review: 6/14/2012